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## Index: Symbols & Numbers

{ } curly braces: 4.2.2. More on Variable Syntax
--html option for HTML output: 1.5.2. Built-in Help
--man option for printing help articles: 1.5.2. Built-in Help
- minus sign: 3.3. Options
  8.4.4. Resetting Traps
  as command: 2.4.4. Moving Around in the History File
--nroff option for command help: 1.5.2. Built-in Help
( ) parentheses
  ((...)) for arithmetic expressions: 6.2.2. Arithmetic Conditionals
  enclosing arithmetic expressions: 6.2. Numeric Variables and Arithmetic
  for subshells: 8.6.2. Subshells
[ ] square brackets: 4.5.2.3. Korn shell versus awk/egrep regular expressions
  [[...]] for comparison tests: 5.1.4. Condition Tests
  [...] for condition tests (old syntax): 5.1.4. Condition Tests
    5.1.4.1. String comparisons
  set construct wildcards and: 1.6.2. Filenames and Wildcards
-A option to read command: 7.2.3.5. Options to read
-a option to ulimit command: 10.2.2. ulimit
* asterisk: 1.6.2. Filenames and Wildcards
  as built-in variable: 4.2.1. Positional Parameters
  as command (vi-mode): 2.4.6. Filename and Variable Completion and Expansion
  as default in case statement: 5.3. case
  as regular expression operator: 4.5.2.1. Regular expression basics
  as wildcard: 1.6.2. Filenames and Wildcards
    1.6.2. Filenames and Wildcards
  for accessing entire array: 6.4.1. Indexed Arrays
@ at sign
  as built-in variable: 4.2.1. Positional Parameters
    as default list in for statement: 5.2. for
    as default list in select statement: 5.4. select
  as regular expression operator: 4.5.2.1. Regular expression basics
    4.5.2.3. Korn shell versus awk/egrep regular expressions
  for accessing entire array: 6.4.1. Indexed Arrays
  for preserving whitespace: 6.4.1. Indexed Arrays
backslash: 1.9.2. Backslash-Escaping
  as command: 2.4.6. Filename and Variable Completion and Expansion
-c option to ulimit command: 10.2.2. ulimit
^ caret character: 2.3.4. Moving Around in the History File
  as bitwise operator: 6.2. Numeric Variables and Arithmetic
  as command: 2.4.1. Simple Control Mode Commands
  matching beginning of line in regular expressions: 10.1. Installing the Korn Shell as the Standard Shell
: colon: 1.7.3. Pipelines
  4.5.1. Syntax of String Operators
  4.5.1. Syntax of String Operators
, comma, as command: 2.4.5. Character-Finding Commands
0 command: 2.4.1. Simple Control Mode Commands
-d file attribute operator: 5.1.4.3. File attribute checking
  5.5. while and until
-d option
  to read command: 7.2.3.5. Options to read
  to ulimit command: 10.2.2. ulimit
$ dollar sign
  $((...)): 6.2. Numeric Variables and Arithmetic
  $@/$* variables: 4.2.1. Positional Parameters
  as built-in variable: 2.2. The History File
    8.4.2. Process ID Variables and Temporary Files
  as command: 2.4.1. Simple Control Mode Commands
  as pattern-substitution operator: 4.5.4. Pattern Substitution Operators
  as variable name operator: 4.5.5. Variable Name Operators
. dot
  .. indicating parent of working directory: 1.6.1.3. Changing working directories
  as redo command: 2.4.3. Deletion Commands
  indicating hidden files: 1.6.2. Filenames and Wildcards
  to run scripts: 4.1. Shell Scripts and Functions
  indicating working directory: 1.6.1.3. Changing working directories
-e file attribute operator: 5.1.4.3. File attribute checking
  5.2. for
-e option
  to hist command: 2.5. The hist Command
  to print command: 7.2.1.2. Options to print
-ef file attribute operator: 5.1.4.3. File attribute checking
-eq arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
= equal sign: 7.2.3.3. Code blocks
  == string comparison operator: 5.1.4.1. String comparisons
  as command: 2.4.6. Filename and Variable Completion and Expansion
  as string comparison operator: 5.1.4.1. String comparisons
  as variable assignment operator: 3.4. Shell Variables
! exclamation point
  != string comparison operator: 5.1.4.1. String comparisons
  as built-in variable: 8.4.2. Process ID Variables and Temporary Files
  as negation operator: 5.1.4.3. File attribute checking
    5.1.4.3. File attribute checking
  as regular expression operator: 4.5.2.1. Regular expression basics
    4.5.2.1. Regular expression basics
    4.5.2.3. Korn shell versus awk/egrep regular expressions
  indicating negation in character set: 1.6.2. Filenames and Wildcards
-f file attribute operator: 5.1.4.3. File attribute checking
-f option: 6.5.3. Type and Attribute Options
  to print command: 7.2.1.2. Options to print
  to typeset command, suboptions for: 6.5.4. Function Options
  to ulimit command: 10.2.2. ulimit
-F option to ls command: 3.2. Aliases
-ft option to typeset command: 9.1.1. Set Options
-G file attribute operator: 5.1.4.3. File attribute checking
-ge arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
` grave accent: 4.6. Command Substitution
-gt arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
# hash mark
  ## pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    6.2.3. Arithmetic Variables and Assignment
  as built-in variable: 4.2.1. Positional Parameters
  as command: 2.4.7. Miscellaneous Commands
  as pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    4.7. Advanced Examples: pushd and popd
    5.5. while and until
  indicating comments: 4.5.1. Syntax of String Operators
  size of arrays and: 6.4.1. Indexed Arrays
-i option: 6.5.3. Type and Attribute Options
  to grep command: 4.6. Command Substitution
  to typeset command: 6.5.3. Type and Attribute Options
-L file attribute operator: 5.1.4.3. File attribute checking
-l option
  to hist command: 2.5. The hist Command
  to jobs command: 8.2.1. Foreground and Background
  to kill command: 8.3. Signals
  to ls command: 1.6.2. Filenames and Wildcards
-L string formatting option: 6.5.2. String Formatting Options
-le arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
-lt arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
-m option to ulimit command: 10.2.2. ulimit
-n option
  to jobs command: 8.2.1. Foreground and Background
  to print command: 4.5.1. Syntax of String Operators
    5.1.4.3. File attribute checking
    6.5.2. String Formatting Options
    7.2.1.2. Options to print
  to read command: 7.2.3.5. Options to read
  to sort command: 1.1. What Is a Shell?
  to ulimit command: 10.2.2. ulimit
-n string comparison operator: 5.1.4.1. String comparisons
  5.4. select
-ne arithmetic comparison operator: 5.1.4.4. Arithmetic conditionals
-nt file attribute operator: 5.1.4.3. File attribute checking
  7.3.4. eval
-O file attribute operator: 5.1.4.3. File attribute checking
-ot file attribute operator: 5.1.4.3. File attribute checking
-p option
  to jobs command: 8.2.1. Foreground and Background
    8.3.2. kill
  to print command: 7.2.1.2. Options to print
    8.5.4. Coroutines with Two-Way Pipes
    8.5.5. Two-Way Pipes Versus Standard Pipes
  to read command: 7.2.3.5. Options to read
    8.5.4. Coroutines with Two-Way Pipes
    8.5.5. Two-Way Pipes Versus Standard Pipes
  to ulimit command: 10.2.2. ulimit
  to whence command: 4.6. Command Substitution
% percent sign
  %% pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.7. Advanced Examples: pushd and popd
    5.5. while and until
    5.5. while and until
    6.2.3. Arithmetic Variables and Assignment
  as command: 2.4.5. Character-Finding Commands
  as pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    5.2. for
    5.2. for
    5.3. case
  specifying jobs: 8.2.1. Foreground and Background
    8.2.1. Foreground and Background
    8.3.2. kill
| pipe (see pipelines)
  1.7.3. Pipelines
  7.1. I/O Redirectors
  7.1. I/O Redirectors
  || for condition tests: 5.1.4.3. File attribute checking
  || for exit statuses: 5.1.2. Combinations of Exit Statuses
  |& for two-way pipes: 8.5.4. Coroutines with Two-Way Pipes
  as bitwise operator: 6.2. Numeric Variables and Arithmetic
  as case pattern separator: 5.3. case
+ plus sign: 3.3. Options
  as command: 2.4.4. Moving Around in the History File
  as regular expression operator: 4.5.2.1. Regular expression basics
    4.5.2.1. Regular expression basics
    4.5.2.3. Korn shell versus awk/egrep regular expressions
? question mark
  as built-in variable: 5.1.1. Exit Status and Return
  as regular expression operator: 4.5.2.1. Regular expression basics
    4.5.2.1. Regular expression basics
    4.5.2.3. Korn shell versus awk/egrep regular expressions
  as wildcard: 1.6.2. Filenames and Wildcards
    4.5.2.3. Korn shell versus awk/egrep regular expressions
  using with ERR fake signal: 9.1.2.2. ERR
-r file attribute operator: 5.1.4.3. File attribute checking
-r/R options: 6.5.3. Type and Attribute Options
  6.5.3. Type and Attribute Options
  to print command: 7.2.1.2. Options to print
  to read command: 7.2.3.5. Options to read
-s file attribute operator: 5.1.4.3. File attribute checking
-s option
  to hist command: 2.5. The hist Command
  to print command: 7.2.1.2. Options to print
  to read command: 7.2.3.5. Options to read
    9.2.3.1. Commands
  to ulimit command: 10.2.2. ulimit
; semicolon
  ;; in case statement: 5.4. select
  ;& in case statement: 5.3.1. Merging Cases
  as command: 2.4.5. Character-Finding Commands
  as statement separator: 3.2. Aliases
    5.1.4.1. String comparisons
    9.2.5. Exercises
-t option
  to read command: 7.2.3.5. Options to read
  to ulimit command: 10.2.2. ulimit
~ tilde: 1.6.1.2. Tilde notation
  7.3.2. Substitution Order
  (see also tilde notation)
  as bitwise operator: 6.2. Numeric Variables and Arithmetic
  as command: 2.4.7. Miscellaneous Commands
-u option
  to print command: 7.2.1.2. Options to print
  to read command: 7.2.3.5. Options to read
_ underscore, as command: 2.4.7. Miscellaneous Commands
-v option
  to ulimit command: 10.2.2. ulimit
  to whence command: 4.1.1. Functions
    9.2.5. Exercises
-w file attribute operator: 5.1.4.3. File attribute checking
-x file attribute operator: 5.1.4.3. File attribute checking
  5.5. while and until
-x option: 6.5.3. Type and Attribute Options
-z string comparison operator: 5.1.4.1. String comparisons
  5.1.4.1. String comparisons
  5.1.4.1. String comparisons
& ampersand: 1.8. Background Jobs
  1.8. Background Jobs
  1.8. Background Jobs
  (see also background jobs)
  && for condition tests: 7.2.3.3. Code blocks
  && in exit status syntax: 5.1.2. Combinations of Exit Statuses
  && logical operator: 5.1.4.3. File attribute checking
  as bitwise operator: 6.2. Numeric Variables and Arithmetic
/bin directory: 3.4.2.6. Command search path
/bin/bsh: 10.1. Installing the Korn Shell as the Standard Shell
/bin/sh: 10.1. Installing the Korn Shell as the Standard Shell
.cshrc file: 3.5.2. The Environment File
  setuid shell scripts and: 10.4.4. Setuid and Privileged Mode
/dev/null file: 5.1.2. Combinations of Exit Statuses
/etc/hosts file: 7.2.3.3. Code blocks
/etc/passwd file: 1.7.3. Pipelines
  7.3.3. Quoting
  restricting user login shell and: 10.4.2. Restricted Shell
  user account information and: 7.1.1. Here-Documents
/etc/profile file: 3.1.1. The /etc/profile File
  5.4. select
  aliases defined in: 10.2.3. Types of Global Customization
  environment customization and: 10.2. Environment Customization
/etc/suid_profile file: 10.4.4. Setuid and Privileged Mode
/etc/termcap file: 3.4.2.5. Terminal types
.kshrc file: 3.5.2. The Environment File
< > angle brackets: 7.1. I/O Redirectors
  in I/O redirection: 1.7.2. I/O Redirection
  << >> bitwise operators: 6.2. Numeric Variables and Arithmetic
.profile file: 3.1. The .profile File
  restricted shell and: 10.4.2. Restricted Shell
  vs. environment file: 3.5.2. The Environment File
" " quote marks: 1.9.1. Quoting
  1.9.3. Quoting Quotation Marks
  3.4.1. Variables and Quoting
  7.3.2. Substitution Order
  7.3.3. Quoting
  arithmetic expressions and: 6.2. Numeric Variables and Arithmetic
  secure shell scripts and: 10.4.1. Tips for Secure Shell Scripts
  single (''): 1.9.1. Quoting
    1.9.3. Quoting Quotation Marks
    7.3.2. Substitution Order
    7.3.3. Quoting
    trap command and: 8.4. trap
.sh_history file: 2.2. The History File
/string command: 2.4.4. Moving Around in the History File
/tmp directory: 8.4.2. Process ID Variables and Temporary Files
  9.2.1.1. The driver script
/usr/bin directory: 3.4.2.6. Command search path
/usr/lib directory: 9.2.1.1. The driver script
@x command: 2.4.7. Miscellaneous Commands

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